Questions 1-5: place the letter corresponding to the correct choice in the blank before each question [1k] each a. the area of chemistry that deals heat with rates of reactions 2. work b. the transfer of thermal energy from a warmer object to a cooler object (cooking soup on a stove) 3. energy c. the energy of a body or system due to its position or composition 4. potential energy d. the ability to do work 5. chemical kinetics e. the amount of energy transferred by a force over a distance

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.